Vishay Semiconductor Opto Division VLMB3140-GS08

Overview

VLMB3140-GS08 from Vishay Semiconductors is a blue InGaN-on-SiC surface-mount LED in PLCC-2 package, delivering ≥45 mcd luminous intensity at 20 mA, with dominant wavelength 462–476 nm and ±60° viewing angle. It serves as a high-brightness indicator or backlight source in automotive dashboards, telecom interfaces, and LCD panels.

For engineers reviewing the VLMB3140-GS08 datasheet, VLMB3140-GS08 pinout, VLMB3140-GS08 application, or VLMB3140-GS08 equivalent, key selection criteria include forward voltage (3.0–4.2 V), thermal resistance (350 K/W), ESD withstand (>1 kV), JEDEC Level 2a preconditioning compliance, and IR reflow compatibility per J-STD-020B.

Technical Context

This device uses InGaN epitaxial layers on silicon carbide substrate to achieve stable blue emission with low temperature coefficients: –0.4 %/K for luminous intensity and –4 mV/K for forward voltage. Its non-diffused lens enables efficient coupling to light pipes and edge-lit backlights.

The PLCC-2 package features a white thermoplastic body with embedded lead frame and clear epoxy-filled reflector cavity. Thermal resistance junction-to-ambient is 350 K/W when mounted on a PCB pad >16 mm², supporting operation from –40 °C to +100 °C ambient.

Key Specifications

Pinout & Package

Package: SMD PLCC-2 (leadless plastic chip carrier, 2-terminal), 3.5 mm × 2.8 mm footprint, 1.75 mm height, non-diffused lens, white thermoplastic body with clear epoxy reflector cavity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED indicator applications.

Compared with VLMB3140-GS08, LBT673 offers marginally lower brightness tolerance while maintaining identical form factor and thermal behavior; VLMB3140-GS18 provides identical electrical and optical performance but optimizes for volume procurement logistics rather than design substitution.

Availability

VLMB3140-GS08 is available at Aetrix Electronics and suitable for automotive dashboard backlighting, telecom indicator panels, and LCD edge-lit backlighting requiring stable component supply, consistent luminous intensity binning, and JEDEC-compliant moisture handling.

Supply support for VLMB3140-GS08 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Semiconductors is a global manufacturer of discrete semiconductors and passive components, headquartered in Malvern, PA, with R&D and manufacturing facilities across Asia, Europe, and the Americas.

The VLMB3140-GS08 belongs to Vishay's standard SMD LED product group, designed specifically for high-reliability indicator and backlight applications demanding consistent color, brightness, and reflow compatibility in automotive, telecom, and consumer electronics.

FAQ

What is the maximum forward current rating for VLMB3140-GS08?

The absolute maximum DC forward current for VLMB3140-GS08 is 20 mA at ambient temperatures ≤80 °C. Exceeding this value risks accelerated degradation and reduced lifetime. The device is rated for 0.2 A surge current only for pulses ≤10 µs. For continuous operation, thermal management must maintain junction temperature below 110 °C - VLMB3140-GS08 achieves this with 350 K/W thermal resistance when mounted on ≥16 mm² copper pad.

Does VLMB3140-GS08 require special handling due to moisture sensitivity?

Yes, VLMB3140-GS08 is classified per JEDEC Level 2a and shipped in dry-packed aluminum bags with humidity indicator labels. After opening, it must be mounted within 672 hours at <30 °C/60 % RH or stored at <10 % RH. If exposed beyond limits, baking at 60 °C for 96 hours (<5 % RH) is required before reflow - VLMB3140-GS08 cannot tolerate uncontrolled moisture absorption prior to soldering.

What is the dominant wavelength range specified for VLMB3140-GS08?

The dominant wavelength for VLMB3140-GS08 is specified as 462–476 nm at 20 mA forward current, with typical value 470 nm. This defines its true blue chromaticity and distinguishes it from blue-green (e.g., VLMBG3100) or true green (e.g., VLMTG3100) variants in the same PLCC-2 family. Wavelength shifts <0.2 nm/mA per Figure 7, ensuring stable color under varying drive conditions - VLMB3140-GS08 maintains this spec across its qualified operating range.

Can VLMB3140-GS08 be used in wave soldering processes?

Yes, VLMB3140-GS08 is qualified for vapor-phase and wave soldering per CECC 00802, with peak lead temperature limited to 255 °C for ≤5 seconds during second-wave exposure. However, IR reflow is preferred per J-STD-020B (peak 240–245 °C, max 260 °C for ≤10 s). Wave soldering requires precise thermal profiling to avoid lens discoloration or epoxy delamination - VLMB3140-GS08's lead-free construction and thermoplastic body support both methods when process limits are strictly observed.

What does the "GS08" suffix indicate in VLMB3140-GS08?

The "GS08" suffix denotes Vishay's 8 mm blister tape packaging option containing 1500 pieces per reel, compliant with DIN IEC 40 (CO) 564. It specifies tape width, cavity depth, and reel dimensions (178 mm diameter, 12.75 mm width) optimized for high-speed pick-and-place equipment. GS08 differs from GS18 (8000 pcs/reel) only in quantity and reel size - all electrical, optical, and mechanical specifications of VLMB3140-GS08 remain identical to other variants in the VLMB3140 series.